Quick facts

O-fallon has a population of around 83053, of which 41264 (49%) are male and 41789 (50%) are female. The average age of the inhabitants of O-fallon is 35.21, meaning that the average person is below the national median age of 37. For every male, there are approximately 1.01 females, meaning that the population is relatively evenly distributed between males and female(s).

Of O-fallon's 83053 residents, around 81250 (97.80%) identify as having a single race. The majority of the population is white, which consists of 89.10% of the population. Of the remaining population, 3886 are black/African Americans (4.70%), 107 are native Americans (0.10%), 3048 are asians (3.70%), 231 are other (0.30%).

The median income of households in O-fallon is $78266.00, meaning that most of the households are above the poverty threshold for families of three. Of the total population, 2.80% of households reported an annual income of less than $10,000.

O'Fallon, MO Zipcodes

The city of O'Fallon has 7 zipcodes recognized by the United States Census Bureau:
63304, 63341, 63366, 63367, 63368, 63376, 63385.